Technical pen adapter



FIG. 1 is a perspective view of a technical pen adapter showing our new design;

FIG. 2 is a right side elevational view thereof, the environmental structure shown in dotted lines depicting the barrel and head of a technical pen is for illustrative purposes only and not a part of the design;

FIG. 3 is an enlarged scale top plan view thereof;

FIG. 4 is an enlarged scale left side elevational view thereof; and

FIG. 5 is a front elevational view thereof. 

The ornamental design for a technical pen adapter, substantially as shown and described. 